Counting Outs: How to Calculate Your Drawing Odds in Poker

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Counting outs is the process of identifying how many cards in the deck can improve your hand to a likely winner. It’s the first step in calculating your equity — the percentage chance your hand will win by showdown. Without this skill, drawing decisions become guesswork. With it, you can evaluate any draw against any bet and determine whether continuing is mathematically justified. Counting outs is a foundational poker skill that directly feeds into pot odds, implied odds, and overall hand evaluation.

Key Concepts

  • What an out is — An out is any unseen card that will, in all likelihood, make your hand the best hand. If you have four clubs and need one more for a flush, any remaining club in the deck is an out.
  • Flush draw — With four cards to a flush (e.g., you hold two clubs and two more clubs are on the board), you have 9 outs: 13 clubs minus the 4 you can see = 9 remaining clubs.
  • Open-ended straight draw (OESD) — When you have four consecutive cards and can complete a straight on either end (e.g., you hold 7-8 and the board shows 5-6), you have 8 outs: four nines and four fours.
  • Gutshot straight draw — When you need a specific rank to complete an inside straight (e.g., you hold 7-9 and need an 8), you have 4 outs: only the four eights.
  • Overcards — If you hold AK and miss the flop entirely, your ace and king may still be outs if they’ll give you top pair on the turn or river. Overcards typically provide 6 outs (3 aces + 3 kings), though this depends on whether those cards actually make you the best hand.
  • Combo draws — A hand can have multiple draws simultaneously. A flush draw plus an open-ended straight draw is a massive 15-out combo draw. Correctly identifying all draws prevents undercounting your equity.
  • Dirty outs — Not all outs are clean. A “dirty out” is a card that technically completes your draw but may simultaneously make an opponent a better hand. For example, if you’re drawing to a flush and the completing card also pairs the board, your opponent may make a full house. Dirty outs should be discounted — counted partially or removed from your total.

How It Works

Example 1: Clean flush draw You hold A♠9♠. The flop comes K♠7♠2♦. You have four spades and need one more for the nut flush. Count your outs: 13 spades total, minus 2 in your hand, minus 2 on the board = 9 outs. With 9 outs on the flop, you have roughly 35% equity to hit by the river (using the Rule of 4).

Example 2: Gutshot with dirty out concern You hold J♣T♦. The board reads K♠9♥4♠. You need a queen to make your straight (Q-J-T-9… wait — you need a Queen for K-Q-J-T-9, or an 8 for J-T-9-8-… let’s re-examine: J-T on a K-9-4 board gives you a gutshot to QJT98… actually you need a Q for KQJT9). You have 4 outs to the queen. However, if the queen of spades completes a possible flush for an opponent, it becomes a dirty out — you still hit your straight but may be drawing dead or drawing thin against a flush. Discount that out accordingly.

Common Mistakes

  • Forgetting combo draws. Players often identify one draw (flush draw) and miss the second (straight draw). Always scan for all possible improvements your hand can make — straight, flush, pair, two pair, trips — and add the outs together, being careful not to double-count cards.
  • Ignoring dirty outs. Counting an out that completes your hand but also completes a better hand for an opponent is one of the most common equity miscalculations. When the board is paired or suited, examine whether your “outs” are truly clean.
  • Counting outs to non-winning hands. An out only counts if it’s likely to make you the best hand. If you have middle pair and are hoping to improve to two pair on the turn, but your opponent almost certainly has top pair with a better kicker, your outs may not be outs at all.
  • Failing to re-count on each street. The number of outs you have on the flop changes on the turn. After the turn card is dealt, you’ve seen one more card — updating your count matters, especially when using the Rule of 2 (turn-to-river approximation).

Practice This Skill

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